From: Jan Kara <jack@suse.cz>
Date: Thu, 4 Sep 2014 14:19:47 +0000 (+0200)
Subject: udf: Properly detect stale inodes
X-Git-Tag: v3.17-rc5~32^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4071b913622316970d0e1919f7d82b4403fec5f2;p=karo-tx-linux.git

udf: Properly detect stale inodes

NFS can easily ask for inodes that are already deleted. Currently UDF
happily returns such inodes which is a bug. Return -ESTALE if
udf_read_inode() is asked to read deleted inode.

Signed-off-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 788fc58ea78e..3a44d9187aad 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1435,8 +1435,10 @@ reread:
 	read_unlock(&sbi->s_cred_lock);
 
 	link_count = le16_to_cpu(fe->fileLinkCount);
-	if (!link_count)
-		link_count = 1;
+	if (!link_count) {
+		ret = -ESTALE;
+		goto out;
+	}
 	set_nlink(inode, link_count);
 
 	inode->i_size = le64_to_cpu(fe->informationLength);